Showing papers by "Eleftherios Papantonopoulos published in 1994"
TL;DR: In this article, the tree level string effective action in the presence of the tachyon mode was studied and it was shown that the 2-dim. static black hole is stable against tachyonic perturbations.
Abstract: We study solutions of the tree level string effective action in the presence of the tachyon mode.We find that the 2-dim. static black hole is stable against tachyonic perturbations.For a particular ansatz for the tachyon field we find an exact solution of the equations of motion which exhibits a naked singularity.In the case of static fields we find numerically that the full system has a black hole solution,with the tachyon regular at the horizon.
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